Physics notes for class 12 – MCQs

By: Prof. Dr. Fazal Rehman | Last updated: May 20, 2025

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1. : Precise measurement is the one which has



2. : Number of significant figures in 0.0010 are



3. : Which of the following is a supplementary unit?



4. : A unit vector is obtained by?



5. : The angle between two Vectors A and B can be found by



6. : The irregular and unsteady flow of fluid are known as?



7. : The frictional force is present in



8. : Drag force depends upon, according to Stoke’s law?



9. : The force that appears as a result of interaction between two moving charges is known as



10. : When a charge passes through a region undeflected, then F(e)=F(m)_______



11. : The direction of vectors L×B is



12. : Electric current produced magnetic field. This fact was discovered by:



13. : Parallel lines carrying current in same direction will:



14. : Cathode ray oscilloscope works by:



15. : What is pressure in the narrow pipe if streamlines are close together?



16. : The power of a concave lens is



17. : A convex lens gives a virtual image only when the object lies



18. : In going from a denser to a rarer medium, a ray of light is



19. : Light signals pass through multimode graded index fiber due to



20. : A lens which converges a beam of parallel rays to a point is called



21. : When a ray of light passes from one medium to another, it bends due to



22. : The image formed by a convex mirror is always



23. : What is the unit of the focal length of a lens?



24. : When white light passes through a prism, it splits into seven colours due to



25. : The lens used in magnifying glass is a



26. : The change in the direction of light at the interface between two different media is known as



27. : A prism disperses light due to its property of



28. : Light enters from air to glass. Which of the following remains unchanged?



29. : The part of the human eye that controls the size of the pupil is



30. : Which instrument is used to view distant objects?



31. : Which of the following helps in the convergence of light rays?



32. : Which of the following phenomena causes the twinkling of stars?



33. : Myopia can be corrected by using



34. : Which part of the human eye is sensitive to light?



35. : Which of the following phenomena is not a result of refraction of light?



36. : The power of a lens is measured in



37. : The phenomenon of bending of light around the corners of an obstacle is called



38. : Which mirror is used by dentists to see an enlarged image of teeth?



39. : Which of the following devices uses a concave mirror?



40. : In optics, the term “real image” means



41. : What is the focal length of a plane mirror?



42. : The image formed by a plane mirror is



43. : Which lens is used to correct hypermetropia (farsightedness)?



44. : The angle between the incident ray and the reflected ray is called



45. : The splitting of white light into seven colours is known as



46. : Which part of the eye controls the size of the pupil?



47. : In which of the following mediums does light travel the fastest?



48. : Which of the following phenomena proves the wave nature of light?



49. : Which device is used to split light into its component colors?



50. : Which type of lens is thicker at the center than at the edges?



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